second round of review

backend/tests/test_counter.py

@@ -1,12 +1,7 @@
 import pytest
-import uuid
 
 from auth import COOKIE_NAME
-
-
-def unique_email(prefix: str = "counter") -> str:
-    """Generate a unique email for tests sharing the same database."""
-    return f"{prefix}-{uuid.uuid4().hex[:8]}@example.com"
+from tests.helpers import unique_email
 
 
 # Protected endpoint tests - without auth